Steam-propelled vehicle.



No. 859,567. EATENTEE JULY 9, 1907. E. LEMP. STEAM EROPELLED VEHICLE.

.APPLIOLTION FILED NGV. 2,1900.

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PATENTED JULY 9, 1907.

H.LEMP. STEAM PROPBLLED VEHICLE.

APPLICATION FILED NOV. 2,1900.

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No. 859,567. PATENTED JULY 9, 1`907.

H. LEM?. STEAM PROPELLED VEHICLE..4

APPLICATION FILED NOV. 2.1900.

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UNITED sTATEs PATENT oEEroE.

HERMANN LEMP, OF LYNN, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO GEN- ERAL ELEOTRO COMPANY, A CORPORATION OF NEW YORK.

STEAM-PROPELLED VEHICLE.

Specification of Letters Patent.

Patented July 9, 1907.

Original application filed February 28, 1900, Serial No. 6,805. Divided and this application filed November 2,1900. Serial No. 35,254.

To all Iwhom it 'may concern:

Be it known that l, HERMANN LEMP, a citizen ofthe United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Steam-Propelled Vehicles, of which the .following is a specification.

' The present application is a division of my application S. N. 6,805, filed Feb. 28, 1900, which division is made in accordance with the requirements i of the United States Patent Office, under Rules 4l and 42.

The present invention relates to steam-propelled vehicles, and more particularlyl to the means employed for controlling the exhaust from the engine or engines and for taking care of the products of combustion from f l5 the burner or burners.

The object of the invention is to improve'the construction and operation' of steam-propelled vehicles as will be more fully described and claimed hereinafter.

lu the accompanying drawings which illustrate my i invention, Figure l. is a longitudinal section of a steampropelled carriage with certain parts in elevation; Fig. 2 is a vertical section of the boiler and burner; Fig. 3

NV is/a partial vertical section of a boiler tak'en on line 3-3 of Fig. 2, looking in the direction of the arrow; Fig. 4 is a plan view of the top of the boiler; Fig` 5 is a transverse section of the boiler cover or hood taken on the line 5-5 of Fig. 2, and Fig. 6 is also a transverse section through the cover or hood of the boiler taken on the line GwG of Fig. 2.

Referring more particularly to Fig. l, A, Arepresent the lixedaxles of the vehicle. The front wheels are used for steering and are supported by the wellknown double-axle suspension, a handle A3 being employed to move the wheels. The rear wheels are mounted directly on the axle A1 and are mechanically connected to the engine by sprockets and chains A2 as indicated by the dotted lines. The carriage frame lis constructed of tubes, arranged to substantially form a rectangle, and is supported from the axles by four full elliptic springs l5, two beingsecured to the front "axle and two to the rear axle. The engine C is of the single-acting four-cylinder type, and is supported from `the rectangular frame of the vehicle in any suitable manner. On the main shaft of thev engine is a gear, and meshing therewith is a second gear which is carried by the intermediate shaft O1; this shaft extends across the vehicle and is divided into two parts, which parts are connected by a differential system of gearing, known as a jack-in-the-box in the ordinary manner. Surrounding the gearing is a gear-case O2', a portion of which is formed integral with the engine frame', and in the case are formed bearings for the intermediate shaft. Mounted on the vehicle frame in any suitable manner is the main body or box of the vehicle, The front of the body is provided with a curved dash D, and back of the dash is a seat E for the occupants of the vehicle. The body or box of the vehicle is extended rearwardly and incloses the boiler F and the water-tank G. The rear portion of the vehicle body is provided with a top plate containing a flue opening, which opening is so situated with respect to the flue opening N that the fire` gases pass freely through it when the forced draft is not in operation. The water-*tank is U-shaped in construction, the main portion being located directly under the seat, while the arms or extensions surround the boiler and its down draft flue on two sides and extend to the rear of the body. Situated directly under the dash is a fuel-tank D1, and connected therewith is a small hand pump Dl for furnishing an initial air pressure to the tank. Extending from the fuel-tank to the burner ljI is a fuel-pipe D3. The engine is controlled by a throttle valve having a hand wheel O3, and is reversed lo'y the reversing lever O4. Mounted on an extension of the main frame is a foot lever l, which'is arranged to actuate the water-pump G1, the latter being connected with the water-tank by a pipe l2. The foot lever is only employed for actuating the pump under certain conditions, suchrfor example as when the vehicle is started or when thereris an unusual demand for water. p lt is to be understood that suitable apparatus' i is employed for maintaining a supply of water to the boiler and fuel to the burner, but since` this forms no part ofthe present invention it is not illustrated. i Carried on the same extension with the foot lever for operating the pump is a brake-lever .l which may be connected` with the brake-mechanism in any suitable manner. Steam is admitted to the engine from the pipe G5, and the exhaust is carried from the engine by the pipe O. l Referring more particularly to Figs. 2 to 6 inclusive, the construction and arrangement of the boiler parts and the draft fluesfor the waste products of combus` tion and the exhaustwillfbe described. The boiler is of a type suitable for the rapid generation of steam and is surrounded on three lside/s by the water-tank Gr. It is located in the rear of the body of the vehicle and is composed of a series of grids K, which are united in any suitable manner. rI hese grids are so placed with respect to each other that passages are provided through which the products of combustion may pass. The grids are supported by means of horiZontally-extending pieces K1 that are supported by the boiler casing K2. Surrounding the burner Il and located below the boiler-tubes, is a coil of pipe K3 which constitutes a feed water heater. The construction and arrangenient of the boiler-tubes, the burner, and the feed water heater are not claimed in this applieation, but form the subject of the parent application, Serial No. 6,805, vfiled Feb. 28, 1900, of which .this is a division. Oevering the top of the boiler casing is a cast-metal cover or soV hood L and in this cover is formed a chamber L that is connected to the exhaust pipe CG from the engine at one point and to the down draft flue M at another.

-The down draft flue consists of a rectangular sheetbackward and downward to a point near the roadbed.-

In addition to this is an up draft flue N communicating with the external air, through which the products of combustion escape to the external atmosphere when the vehicle is standing still or running at its-lowest speeds. The parts are so arranged that the products of combustion are conveyed to the rear of the vehicle where they will not be offensive to the occupants. The downwardly opening :line M and the upwardly opening iiue N are in permanent and unrestricted communication, as clearly shown inl Fig. 2. In other words the flue openings are so related that the fire gases will automatically pass out of the upper or lower opening according to the condition of operation, and this without thoughtor action on the part of the operator. Communication between rthe flue opening and `the re chamberis established through the rectangular flueA openings M1 formed in the cover L.

Extending across the cover in a manner to substan-k tially divide the chamber Ll into two parts, is a web L2, constituting a baffling plate, shown in dotted lines in Fig. 4 and in section in Fig. (i. This plate serves to distribute the steam and to prevent it from passing 'divrectly'to the outlet and to the 'down draft flue. The outlet opening between'the chamber and the down draft flue M is restricted, as indicated by the series of small holes L; these holes or openings are slightly curved at their outer extremityso as to direct the passage of steam downward. The effect of this arrangement is to muffle the sound of the exhaust so that in place of a series of short sharp puffs taking place at the l ends of the piston'strokes, there is a constant hissing of low tone taking place when the carriage is in operation. A further advantage in making `restricted openings between the cham ber L and the down draft flue lies in the fact that a series of small jets working under high pressure make a better draft than one or more larger openings working under a low pressure.

As before stated, when the vehicle is standing still or is moving very slowly, the products of combustion pass rearwardly to the external atmosphere through the up draft flue N, or, in other words, through a natural draft flue; but as soon as the engine is started into operation at the speedsordinarily employed, the exhaust passing into the down draft flue, as indicated by the arrows lc, Figs. 2 and 3, takes with it substantially all of said products, and at the same time materially increases the draft. The metal forming the hood or chamber L, being located directly over the fire box,l becomes very hot, and in addition tothe advantage setl forth, it' serves to superheat or to reheat the exhausted steam so as to render it invisible except in damp weather.A

Having thus describedl my invention what I claim as new and desire to secure by Letters Patent of the United States, is:

1. A boiler, a casing above the boiler to receive the products of combustion, a ue or stack extending downward from said casing, and means to discharge exhaust steam into said flue or stack so as to carry the products down and out of the lower end of the latter, and an air inlet opening into which the air is drawn by the exhaust and out of'iwhich the' products of combustion iow naturally when exhaust is not operating.

2. ln a steam carriage, the combination with the boilerfurnaee of a .constantly open upwardly discharging fiue, a

constantly open downwardly discharging flue, and means for forcing the downward discharge.

3. In a steam carriage, the combination with a boiler-,- furnace and engine, of a constantly open upwardly discharging tlue, a constantly open downwardly discharging liuc, and means for discharging the exhaust-steam from the engine into the downwardly discharging flue, substantially as described.

4. In a steam carriage, the combination with the boilerfurnace, of a constantly open upwardly discharging iiue, a constantly open downwardly discharging flue in unrestricted communication with the upwardly discharging liuc, and means for forcing the downward discharge.

5. ln a steam carriage, the combination with a boiler, furnace and engine, of a constantly open upwardly discharging Hue, a constantly open downwardly discharging iiue in unrestricted communication with the upwardly discharging Hue, and means for discharging the exhaust steam from the engine into the downwardly discharging i'lue, substantially as described.

`(5. In a steam carriage, the combination with a furnace and boiler of a constantly open flue for the discharge of the products of `combustion by natural draft, a secomon stantly open flue for the discharge of thc products of combustion by forced draft, and means for producing the forced draft and thereby diverting the discharge from the natural-draft liuc.

'i'. In a steam carriage, the combination with a furnace, boiler and engine of a constantly open natural-draft llue, a second constantly open flue in uninterrupted communication with the first, and means for discharging the exhaust steam from the engine into the second flue and thereby diverting the products of combustion from the first, substantially as described.

8. 'lhe combination with a boiler, furnace and engine, ot' a constantly open upwardlydischarging tine, a constantly open `downwardly discharging flue, a chamber heated by the escaping products of combustion, and means for passing the 'exhaust steamv from the engine into the chamber and from the latter into the downwardly discharging flue, substantially as described.

i). The combination with a boiler, furnace andv engine, of a constantly open upwardly discharging flue, a constantly open downwardly discharging flue, a chamber heated by the escaping products of combustion, means for passing the exhaust steam from the engine into the chamber, a baille plate in the chamber for distributing the exhaust steam within the same, and means for discharging' the reheated exhaust steam from the chamber into the downwardly discharging iiue, substantially as described.

In witness whereof I have hereunto set my hand this 130th day of October, 1900.

HERMANN LEMP. 

